<template>
  <el-container class="home-container">
  <el-header>
    <div>
      <div class="avatar_box"><img src="../assets/logo.png" alt=""/></div>
      <span>电商后台管理系统</span>
    </div>
    <el-button type='info' @click="logout">退出</el-button></el-header>
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="isCollapsed ? '64px' : '200px'">
      <div class="toggle-button" @click="toggleCollapse">|||</div>
      <!-- 侧边栏菜单区域-->
       <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409eff"
      unique-opened
      :collapse="isCollapsed"
      :collapse-transition="false"
      router
      :default-active="activePath"
      >
      <!-- 一级菜单 -->
      <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
        <!-- 一级菜单模板区-->
        <template slot="title">
          <!-- 图标 -->
          <i :class="iconObj[item.id] + ''"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
       <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children"
        :key="subItem.id" @click="saveNavState('/' + subItem.path)">
          <template slot="title">
          <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template>
       </el-menu-item>
      </el-submenu>
    </el-menu>
    </el-aside>
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>
<script>
export default {
  data () {
    return {
      // 菜单数据
      menulist: [],
      iconObj: {
        125: 'iconfont icon-yonghu',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapsed: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      // 清空 token
      window.sessionStorage.clear()
      // 跳转到登录页
      this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList () {
      const { data: rs } = await this.$http.get('menus')
      if (rs.meta.status !== 200) {
        return this.$message.error(rs.meta.msg)
      }
      this.menulist = rs.data
      console.log(rs)
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollapsed = !this.isCollapsed
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>
<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  > div {
    display: flex;
    align-items: center;
    font-size: 20px;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1
}
.avatar_box {
    height: 40px;
    width: 40px;
    >img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
    }
}
.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
